/*
 * Copyright (c) 2010, okazoh_tk. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  - Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "alkes/win32app/Win32EventDrivenModel.h"

namespace alkes {

#define INTERVAL_TIMER_ID 1

int Win32EventDrivenModel::mainloop(HWND hwnd, Screen* screen, IEventDispatcher* dispatcher)
{
    BOOL ret;
    MSG msg;
    EventData data;

    screen->update();

    SetTimer(hwnd, INTERVAL_TIMER_ID, 16, NULL);

    while (0 < (ret = ::GetMessage(&msg, hwnd, 0, 0)))
    {
        switch (msg.message)
        {
        case WM_PAINT:
            {
                RECT window_rect;
                if (FALSE != ::GetUpdateRect(hwnd, &window_rect, FALSE))
                {
                    Rect rect;
                    rect.x = (Rect::value_type)window_rect.left;
                    rect.y = (Rect::value_type)window_rect.top;
                    rect.width = (Rect::value_type)(window_rect.right - window_rect.left);
                    rect.height = (Rect::value_type)(window_rect.bottom - window_rect.top);

                    screen->render(&rect);
                }
            }
            break;

        case WM_TIMER:
            if (msg.wParam == INTERVAL_TIMER_ID)
            {
                if (screen->update())
                {
                    ::InvalidateRect(hwnd, NULL, FALSE);
                }
            }
            break;

        case WM_MOUSEMOVE:
            data.id_ = AL_WIN32_EVENT_MOUSE_MOVE;
            data.data1_ = LOWORD(msg.lParam);
            data.data2_ = HIWORD(msg.lParam);
            dispatcher->postEvent(data);
            break;

        case WM_LBUTTONDOWN:
            data.id_ = AL_WIN32_EVENT_LBUTTON_DOWN;
            dispatcher->postEvent(data);
            break;

        case WM_SIZE:
            data.id_ = AL_WIN32_EVENT_RESIZE;
            data.data1_ = LOWORD(msg.lParam);
            data.data2_ = HIWORD(msg.lParam);
            dispatcher->postEvent(data);
            break;

        case WM_ERASEBKGND:
            break;

        default:
            ::DefWindowProc(hwnd, msg.message, msg.wParam, msg.lParam);
            break;
        }
    }

    KillTimer(hwnd, INTERVAL_TIMER_ID);

    return 0;
}

}
